I was very impressed with the foley in "Gravity". Not a single sound took place in space, but all from the perspective of the characters, from inside the suites, ships and stations.
I imagine it was done in part by using impulse responses. Would you guys agree? I'd think it would be much like the impulse they took of the INSIDE of a helmet for "Premetheus" - but opposite. Taking a microphone and putting it inside a helmet or structure and playing a sweep from outside.
I'd love to hear what you guys thought and if you have any information on how the sound was done.